INTERVAL

Syntax

INTERVAL(N0,N1,N2,N3,...)

Description

Returns the index of the last argument that is less than or equal to the first argument, or is NULL.

Returns 0 if N0 < N1, 1 if N1 <= N0 < N2, 2 if N2 <= N0 < N3 and so on or -1 if N0 is NULL. All arguments are treated as integers. It is required that N1 <= N2 <= N3 <= ... <= Nn for this function to work correctly because a fast binary search is used.

Examples

SELECT INTERVAL(22, 24, 26, 28);

+--------------------------+
| INTERVAL(22, 24, 26, 28) |
+--------------------------+
|                        0 |
+--------------------------+

SELECT INTERVAL(22, 22, 22, 22, 23);

+------------------------------+
| INTERVAL(22, 22, 22, 22, 23) |
+------------------------------+
|                            3 |
+------------------------------+

SELECT INTERVAL(25, 24, 26, 28);

+--------------------------+
| interval(25, 24, 26, 28) |
+--------------------------+
|                        1 |
+--------------------------+

SELECT INTERVAL(27, 24, 26, 28);

+--------------------------+
| interval(27, 24, 26, 28) |
+--------------------------+
|                        2 |
+--------------------------+

SELECT INTERVAL(27, 25, 26, 27);

+--------------------------+
| interval(27, 25, 26, 27) |
+--------------------------+
|                        3 |
+--------------------------+

SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200);

+--------------------------------------+
| INTERVAL(23, 1, 15, 17, 30, 44, 200) |
+--------------------------------------+
|                                    3 |
+--------------------------------------+

SELECT INTERVAL(10, 1, 10, 100, 1000);

+--------------------------------+
| INTERVAL(10, 1, 10, 100, 1000) |
+--------------------------------+
|                              2 |
+--------------------------------+

SELECT INTERVAL(22, 23, 30, 44, 200);

+-------------------------------+
| INTERVAL(22, 23, 30, 44, 200) |
+-------------------------------+
|                             0 |
+-------------------------------+

SELECT INTERVAL(10, 2, NULL);

+-----------------------+
| INTERVAL(10, 2, NULL) |
+-----------------------+
|                     2 |
+-----------------------+

_{This page is licensed: GPLv2, originally from fill_help_tables.sql}